A rock is thrown horizontally off a 30-m high cliff at 15 m/s. a. How long does it take this rock to reach the ground?
b. How far away from the bottom of the cliff, horizontally, does the rock hit the ground?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

What is the single most important equation in all of physics?